Sapphire Windows, Circular (Random Orientation)

Sapphire Windows, Circular (Random Orientation) - View 3

$7.25 ~~$10.5~~ In stock

Diameter tolerance	+/- 0.05 mm
Thickness tolerance	+/- 0.05 mm
Surface quality	80-50 Scratch-Dig
Surface accuracy	<15λ per inch
Clear aperture	90%
Edges	Fine ground and beveled

Sapphire optical components are used in a variety of applications requiring high durability or broad spectral ranges. Known for its exceptional hardness additional Sapphire optical specifications can be found here.

Ideal applications include:

With PbS, PbSe, and InSb detectors. Spectral transmittance matches spectral sensitivity of detectors
Infrared, high temperature, high pressure, high thermal shock environments
Scratch resistant elements, used in rain resistance, or bar code scanning applications

Esco Optics offers circular sapphire with random orientation. For custom applications beyond our standard catalog optics, please contact us.

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Customer Reviews (5.0 / 5 · 5 reviews)

Alexander ★★★★★ Oct 18, 2026

I needed these for a precision optics project, and the diameter and thickness being held to +/- 0.05 mm made alignment much easier than I expected. The surface quality is clean with no visible scratches, so they’re performing perfectly for my setup.

Ruby R. ★★★★★ Oct 17, 2026

The surface accuracy under 15λ per inch is spot-on for what I needed, and the 80-50 scratch-dig finish looks flawless under magnification. These circular windows arrived dead-on to the stated diameter tolerance, which saved me from having to rework my mount.

Victoria M. ★★★★★ Oct 13, 2026

The edge finish on these is clean enough that I didn't need to do any touch-up before mounting them in my optical setup. Tolerance held to +/- 0.05 mm on both the diameter and thickness, which matched my calipers exactly. Clear aperture of 90% left plenty of usable surface for the beam path.